Import commits from upstream Linux replacing some downstream patches.
Move accepted patches from pending-{5.15,6.1} to backport-{5.15,6.1}.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Backport patch allowing to set the MDIO bus clock frequency.
By default the MDIO bus clock runs on 2.5 MHz, allow increasing it
up to 25 MHz.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>